Cita APA (7a ed.)

Davis, J. L. (2009). The Northwest nature guide: Where to go and what to see month by month in Oregon, Washington, and British Columbia. Timber Press.

Cita Chicago Style (17a ed.)

Davis, James L. The Northwest Nature Guide: Where to Go and What to See Month by Month in Oregon, Washington, and British Columbia. Portland, Or.: Timber Press, 2009.

Cita MLA (8a ed.)

Davis, James L. The Northwest Nature Guide: Where to Go and What to See Month by Month in Oregon, Washington, and British Columbia. Timber Press, 2009.

Precaución: Estas citas no son 100% exactas.